Question

The electric field just above the surface of the charged drum of a photocopying machine has a magnitude E of 2.5 × 105 N/C. What is the surface charge density on the drum, assuming that the drum is a conductor?

Answer 1

`Charge_(density)=2.2125*10^(-6)C/m^(2)`

Step-by-step explanation:

Given data

Electric Field E=2.5×10⁵ N/C

To find

Charge Density

Solution

From definition of charge density we know that:

Charge Density=Electric field×Permttivity

Where Permttivity ∈₀=8.85×10⁻¹²C²/N.m²

`Charge_(density)=(2.5*10^(5)N/C)*(8.85*10^(-12)C^(2)/N.m^(2))\\ Charge_(density)=2.2125*10^(-6)C/m^(2)`